Five waves pass a dock in 2.0 s. If the waves are traveling at 10.0 m/s, then what is the wavelength of the waves?

Question

anonymous · Answer

v = d/t 
d = v*t 
d = 20m/s 
5 waves

Answer = 20meters/5 
4 ....?

roadjester · Answer

$\Huge \lambda f=c$ Where lambda is the wavelength, f is the frequency, and c is the speed of light.

roadjester · Answer

hmm, based on the information given, I can't assume that it's an electromagnetic wave.
Therefore instead of using "c", use "v", the velocity.

roadjester · Answer

$\Huge \lambda f=v$

anonymous · Answer

wavelength times frequency = velocity?

roadjester · Answer

yep

anonymous · Answer

wavelength times 2.0s = 10 m/s?

roadjester · Answer

(wavelength)(#of waves per time)=velocity

anonymous · Answer

5/2 would be the waves per time?

roadjester · Answer

yup, so for this simple case, your original calculation matches. For more complex waves, what you didn't would be less likely to work out

anonymous · Answer

so it would be wavelength times 2.5 = 10.0 m/s?

roadjester · Answer

yup

anonymous · Answer

so the wavelength would be 4 m?

anonymous · Answer

ok

anonymous · Answer

oh! just one last question sorry I completely forgot! " In a thunderstorm at 20.0°C, Amanda sees a bolt of lightning and hears the thunderclap 3.00 s later. How far from Amanda did the lightning strike?

roadjester · Answer

That's two questions. You passed ur own quota =) 
Bye bye.

anonymous · Answer

lol ok night!